Grease-cup



C. C. HAMILTON AND J. HUTCHINSON.

GREASE CUP.

APPLICATION FlLED SEPT. 20. 1919.

1 ,336, 1 35 Patented Apr. 6, 1920.

E1 1 j Q IT 5-5- [7&5492 4" fiazrzz'Z/aw MEM /1 Joseph Hutch z 2190/7/ WITNESSES I ATTORNEYS umrnn s'rArEs PATENT orincn CLIFFORD COATES HAMILTON AND JOSEPH nu'rcnrnson, or GULL LAKE, SASKATCHE- WAN, CANADA.

GREASE-CUP.

Specification of Letters Patent.

Patented Apr. 6, 1920.

Application filed September 20, 1919. Serial No. 325,083.

To all whom it may concern:

Be it known that we, CLIFFORD GoArus HAMILTON and J osnrrr I-lU'roHINsoN, subjects of the King of Great Britain, and residents of Gull Lake, Province of Saskatchewan, Dominion of Canada, have invented a new and useful Improvement in Grease- Cups, of which the following is aspecification.

This invention relates to grease cups and has reference more particularly to that type of cups using a grease of viscid consistency, and which usually consist of a body portion or base and a cap threaded on the same, and an object of the invention is to provide means for preventing retrograde movement of the cap through constant vibration of the cup.

Another object is to provide means for more positively holding the cap in any set position.

With this and other objects in view the invention consists in certainnovel features of construction and arrangement of parts as will be hereinafter fully described and pointed out in the claims, reference being had to the drawings forming a part hereof, and in which Figure 1 is a vertical section through a grease cup embodying our improvements,

Fig. 2 is a similar section taken through the body portion, with the cap removed,

Fig. 3 is a top plan view of the body portion or base as shown in Fig. 2,

Fig. 1 is a side elevation of the body por tion shown in Figs. 2 and 3.

Referring more particularly to the drawings 10 indicates a grease cup base having a hollow stem 11, an externally threaded portion 12 at its lower end and an enlarged head 13 at the upper end.

This head which consists of an externally threaded vertical wall 13 is connected with the stem by a dished or outwardly flared portion 1A, the wall 13 rising from and connected to the periphery of the upper end of the dished portion 14, said wall, dished portion and stem being made integral.

As hereinbefore stated the head is externally threaded, that is, the outer face of the wall 13 is provided with screw threads upon which the cap 15, which is internally threaded, is to be screwed.

At suitable points, preferably diametrically opposite, the wall 13 is provided with cut-outs or recesses 16, to receive bosses 17 which have external threads 18 on the outer faces thereof, said outer faces projecting slightly beyond the outer plane of the externally threaded wall 13.

The bosses are provided with resilient bent arms including the short portions 19, extending from the bosses and lying normally against the inner face of the wall 13,

and the longer portions 20, extending from the lower ends of the short portions and lying on the dished portion 14;, to which they are rigidly connected by electric welding or by rivets 21 as shown. It will be un derstood that the bent arms are preferably made of plate spring and are so connected with the bosses as to normally cause the said bosses to project the threaded outer faces through the recesses 16, in the walls 13.

The stem of thebase has its outer wall polygonal so that it may be readily screwed into a bearing or the part to be lubricated.

The base having now been supplied with grease, the cap 15 and the bosses 17 are forced within the recesses 16 and the lower end of the cap is then screwed onto the externally threaded wall 13, the spring actuated bosses then move outwardly, and the threads thereon take into the threads of the cap with a frictional contact of such intensity that the cap 15 will be held against retrograde movement due to ordinary vibration or jar.

This gripping or frictional action of the spring actuated bosses is not so strong, however, as to prevent the cap from; being screwed downwardly by hand or suitable tools, to force the grease in the cup to feed to the bearing. Nor will it prevent the removal of the cap by force, to replenish the cu with grease when necessary.

From the above it will be seen that we provide restraining means that while it will not interfere with the normal functions of the grease cup and its cap, yet will effectually prevent retrograde rotation of the cap by vibration, jars, etc, and thereby become lost.

We claim 1. A grease cup comprising in combination a. male member, and a female member, said members having screw threaded engagement with each other, the threaded portion of the male member having radial gaps in its upper wall completely interrupting the thread at such points, externally threaded radial bosses resiliently mounted to project outwardly through said 'aps, the thread of said "bosses coinciding in pitch to the pitch of threaded portion of the male member, and bridgin said gaps, said bosses adapted to threadec ly engage the inner wall of the female member when the latter is in position on the male member and prevent retrograde rotation of the female member by frictional contact therewith.

2. In a grease cup in combination a base 7 member having a hollow stem, a dished head projecting therefrom, a vertical Wall extending upwardly from the periphery of said dished portion, said wall being externally threaded, recesses in the upper ed of said Wall and extending through the same,

radially disposed spring arms secured to and lying Within the aforesaid dished portion,

externally threaded bosses radially disposed at the free ends of said spring arms and projected thereby through said recesses, ant an internally threaded cap adapted to be screwed onto said externally threaded wall and to be frictionally held against retrograde movement by said threaded bosses.

3. A' grease cup comprising in combination, a cup member having an externally threaded head portion, said head portion having radial gaps in its upper wall, a cap member internally threaded and adapted to v be screwed on said threaded head portion,

and radially disposed spring actuated threaded lugs mounted within the said cup member and projecting radially through said gaps to frictionally and threadedly'engage the inner wall of said cap member.

CLIFFORD GOATES HAMILTON. JOSEPH HUTOHINSON. 

